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Y
3
25 tháng 4 2016
Kết quả là:
A:=(17+53)+(46+34)+79
= 70 + 80 +79
= 150+79
= 229
B:= -377 - 179
= 198
KY
7 tháng 7 2021
76.My teacher (come)....will come..here if he (have).....has....time.
77.The trees (grow)......are growing...........very fast at the moment.
78.David seldom (sing).........sings.........an English song.
79.I (help)........will help........you if I (be)......am........free.
80.Peter (borrow)........is going to borrow..........your CDs tonight.
81.If she (ask).......asks....me, I (not/answer)..won't answer.............her.
82.My mother often(tell)......tells.....stories at night.
83.They (travel)......travel......to Canada twice a year.
84.I (talk).......will talk.........with him if he (phone).........phones......me.
85.He (stay).......stayed......up very late last night.
86.He (learn)..........is going to learn.........French tonight.
87.Mr. Pike and Mr. Brown (leave)................will leave.......here next month.
SB
7 tháng 7 2021
76.My teacher (come).will come.....here if he (have).....has.....time.
77.The trees (grow).....are growing...........very fast at the moment.
78.David seldom (sing)........sings..........an English song.
79.I (help)...........will help.....you if I (be).......am.......free.
80.Peter (borrow)................is borrow..your CDs tonight.
81.If she (ask).....askes......me, I (not/answer).......won't answer........her.
82.My mother often(tell)...tells........stories at night.
83.They (travel)......travel......to Canada twice a year.
84.I (talk).............will talk...with him if he (phone).........phones......me.
85.He (stay).......stayed......up very late last night.
86.He (learn)........is learning...........French tonight.
87.Mr. Pike and Mr. Brown (leave)........are going to leave...............here next month.
23 tháng 10 2021
b: \(\dfrac{1121}{1119}+\dfrac{1720}{217}=\dfrac{2167937}{119\cdot217}\)
26 tháng 7 2023
Ta có:
$3^{39}=3^{3\times33}=(3^{3})^{33}=27^{33}>27^{21}$
Mà $11^{21}<27^{21}=>3^{39}>11^{21}$
NT
Nguyễn Thị Thương Hoài
Giáo viên
VIP
26 tháng 7 2023
339 = (313)3
1121 = (117)3
313 = (32)6.3 = 96.3 < 116. 11 = 117
⇒ 313 < 117 ⇒ (313)3 < (117)3
⇒ 339 < 1121
LO
0
NN
2
25 tháng 3 2020
Ta có : 1934 + 1928 + 1231 + 1121 + 2422 = 8636
# chúc bạn học tốt #
H9
HT.Phong (9A5)
CTVHS
25 tháng 7 2023
Ta có:
\(5^{75}=\left(5^5\right)^{15}=3125^{15}\)
\(7^{60}=\left(7^4\right)^{15}=2401^{15}\)
Mà: \(3125^{15}>2401^{15}\)
\(\Rightarrow5^{75}>7^{60}\)
_______________
Ta có:
\(3^{39}< 3^{42}\); \(3^{42}=\left(3^6\right)^7=729^7\)
\(11^{21}=\left(11^3\right)^7=1331^7\)
Mà: \(729^7< 1331^7\)
\(\Rightarrow3^{42}< 11^{21}\)
\(\Rightarrow3^{39}< 11^{21}\)
25 tháng 7 2023
a) \(5^{75}=\left(5^5\right)^{15}=3125^{15}\)
\(7^{60}=\left(7^4\right)^{15}=2401^{15}\)
mà \(2401^{15}< 3125^{15}\)
\(\Rightarrow5^{75}>7^{60}\)
b) \(3^{39}=\left(3^{13}\right)^3=1594323^3;11^{21}=\left(11^7\right)^3=19487171^3\)
mà \(19487171^3>1594323^3\)
\(\Rightarrow3^{39}< 7^{21}\)
847/9 x 3/77
=11/3